All spinel structures do not have

Options

A. CCP array of anions
B. Simple cubic structure
C. BCC array of anions
D. HCP array of anions

Answer

To solve the question "All spinel structures do not have:", we need to analyze the characteristics of spinel structures and the types of arrangements of anions mentioned in the options.

### Step-by-step Solution:

1. **Understanding Spinel Structures**:
- Spinel structures are a type of crystal structure that typically consist of cations and anions. The most common formula for spinel is AB₂O₄, where 'A' and 'B' are cations, and 'O' represents oxide anions.
- In a spinel structure, the anions (O²⁻) occupy the face-centered cubic (FCC) lattice points.

**Hint**: Recall the general formula and arrangement of spinel structures.

2. **Identifying the Anion Arrangement**:
- The anions in spinel structures occupy the FCC lattice, which is also referred to as cubic close packing (CCP). This means that the anions are arranged in a specific three-dimensional pattern that maximizes space efficiency.

**Hint**: Remember that FCC and CCP refer to the same arrangement of anions.

3. **Analyzing the Options**:
- **Option A: CCP array of anions**: This is present in spinel structures since the anions occupy the FCC lattice.
- **Option B: Simple cubic structure**: This arrangement is not typical for spinel structures. Spinel does not have a simple cubic arrangement of anions.
- **Option C: BCC array of anions**: Spinel structures do not have a body-centered cubic arrangement for anions.
- **Option D: HCP array of anions**: Spinel structures do not have a hexagonal close-packed arrangement.

**Hint**: Compare each option with the known structure of spinels.

4. **Conclusion**:
- Since spinel structures do not have simple cubic, BCC, or HCP arrangements of anions, the correct answer to the question is that all spinel structures do not have:
- **B: Simple cubic structure**
- **C: BCC array of anions**
- **D: HCP array of anions**

### Final Answer:
All spinel structures do not have:
- **B: Simple cubic structure**
- **C: BCC array of anions**
- **D: HCP array of anions**